Mongoose was my favorite beer a few years back, and I was always happy when I found a place that sold it.
I tried some a few weeks ago, and wasn't impressed. I figured I better drink some more and pay attention this time. So. I decided the problem is not with Mongoose, there is no problem at all. It's good news! There are so many other great IPA's out there, that Mongoose is now just run of the mill. What used to be a 10 is now a 7.